Infiniter 4-In-1 Function Wireless Presenter with Red Laser Pointer/Wireless Mouse and Media Player Control (LR8) Unique and Practical hot key functions include: page down, page up, play/ESC, and screen blank/back with Power Point Pen function; Sure to assist you in making a professional presentation. Output power: Class IIIa, output power is less than 5mW, eye safe laser product. Wireless remote control distance up to 30 Meter for the room. Plug-and-play 2.4 GHz wireless USB receiver device with no additional software downloads & driver installation required; Built-in docking bay stores receiver for easy pack up and portability Works flawlessly on Windows. OS supported for Windows 10, Windows 8, Windows 7, Vista, XP, Android 4.2 or later models. (Notice: This device can't work on OS Mac 10.0 or later, because some functions are not supported by Mac OS anymore). Use one AAA battery (included) for 10 hours operation time. Easy to use multi-function design for laser pointer, presenter, wireless mouse and Media Player control functions. The mouse function is designed for you to move your cursor at short notice. The moving speed is not as fast as normal mouse. When moving the cursor, you would need to keep pressing the buttons. Plus Drawing Function: Draw Lines to highlight the key areas. The pen function is based on the drawing function which is built-in in the Microsoft PowerPoint software. Because Microsoft makes the function complicated when you try to activate or stop it, we would like to suggest that you should practice this function before you are making formal presentation.